Python

1. Values and control

   Start here

   Write a script with variables, if/else, and loops that terminates and produces the right output.

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2. Functions and scope

   After Values and control — test out to unlock

   Write functions with arguments and return values, and trace scope without using globals as a crutch.

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3. Data structures

   After Functions and scope — test out to unlock

   Choose list, dict, set, and tuple for a task, and write a loop that builds or filters one.

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4. Files and errors

   After Data structures — test out to unlock

   Read and write a text file, and catch a specific exception instead of a bare except.

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5. Objects

   After Files and errors — test out to unlock

   Define a small class with __init__ and methods, and use instances without fighting self.

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6. Modules and testing

   After Objects — test out to unlock

   Split code into a module and write a pytest (or unittest) that fails for the right reason then passes.

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Why a path, not a playlist

From values and control through objects and tests. Later headings open after the one before.

Each heading is its own course with a tutor. Later headings open when you finish — or test out of — the one before.

After you sign in

• •You land on this map — every heading is already there.
• •Take the open class, or test out of a later heading to unlock it.
• •Each heading is one shared course — same syllabus and first class for everyone. Later classes continue on your copy.